Harrow



' J. R. WALKER.

Harrow.

No. 237,789. Patented Feb, 15,1881.

Y ig/yangel? QZ UNrTen STATES PATENT @rtree JAMES It. IVALKER, OF SPRING\VELLS, MICHIGAN.

HARROVV.

SPECIFICATION forming part of Letters Patent No. 237,789, dated February 15; 1881.

Application filed January 15, 1379.

To alL whom Iit muy concern Be it known that I, J Amts It.. WALKER, ot Springwells, \Vayne county, Michigan, have invented an Iinprovementin Harrows, ot' which the following is a specitication.

The nature ot' my invention relates to new and useful improvements in the construction ot' sectional folding hai-rows, so constructed that the various sections may be interchanged with each other or reversed end for end, and the invention consistsin the, peculiar-construction ot' the parts, as more fully hereinafter set forth.

In the drawings, Figure l is a plan view, showing a harrow in two sections, to which others ot' similar construction may be added at will. Fig. 2 is an end elevation of the same.. Fig. 3 is an enlarged elevation ot' one ot' the teeth. Fig. 4 is a cross-section of the saine, showing the diamond shape of the tooth and its oval neck. Fig. 5 isa longitudinal section through 011e ofthe bars at a point where a tooth is inserted.

In the accompanying drawings, which torni a part of this specitication, there are shown two sections ot' a sectional folding harrow, each section ot' which is composed oi' two horizontal bars, A, bent into such forni, substantially as shown, that when moved directly forward each tooth (there being tive provided to each bar) will follow its own line, and the various lines made by the separate teeth will be at equal distances apart. rIhese teeth I3 are made pointed and diamond-shaped in cross-section, as shown in Fig. 4, and each provided at its upper end with a neck, a, ot' oval forni, without a shoulder, and gradually tapering upward, as seen in Fig. 5, and terminating in a threaded bolt, L, at its upper end. By constructing the neck of the tooth without a shoulder the neck can be rolled into shape from steel or iron bars, while with shoulders they have to be hainmered between dies, which is more expensive. The shoulders, also, are liable to hc broken ott' in use, or rounded oli', rendering it impossible to hold the tooth steady any length of time. These heads a are inserted into correspondingly-shaped sockets 'L' in the bars A, so that the bolt end ot' the tooth projects above the bar to receive the cross ties or girts C, by

means ot' which the bars A are held together in pairs, and the teeth are secured in that position by means of the nuts h, thereby rigidly securing the bars, girts, and teeth together in such manner that the teeth cannot turu in their sockets. rIhe end girts, I), are longer than the intermediate girts, C, and project beyond the sides ot' the bars, as shown, and one end ot' each ot' said end girts is enlarged, as shown at c, which enlargement is provided with a vertical slot. The opposite end terminates in a hook, d, partially turned back upon itself, and these ends are so arranged with relation to each other that the various sections com posing the harrow may be interlocked by inserting the hooks through the slots ot' the adjoining sections, so that one section may he interchanged with another or reversed in its position, as may be desired or convenience may require, Each section is provided at each end with a draw-hook, E, to which the draw-bar F is attached. 'Ihis draw-hook is pivotally secured to the second girt from each end, by slipping its end over the projecting end ot' the tooth-bolt, and projects iorward over the end girt. Should this draw-hook be rigidly attached and the harrow not be equally balanced, the Jforward motion ot' the harrow would be apt to be at an angle to the direct line of draft.

'Io remedy this defect each ot' the end girts is i provided with a slot, e, through which a suitable boltorset-screw,f, will pass into the dra-whooli, and by these means said hook may be adjusted as required.

I ain aware that sectional folding harrows have been heretofore constructed and are in common use, consequently I do not broadly claim the invention thereot', but

What I claim, and desire to secure by Letters Patent, is-

l. In a sectional harrow, the combina-tion, with the longitudinal bars A, bent as described, and connected together by the intermediate transverse girts, C, and end girts, both secured to the longitudinal bars by the harrow-teeth, of the end girts, D, each provided with a slot, e, draw-hooks E', each pivoted at its inner end to one of the transverse girts by an upwardlytapering harrow-tooth, adj Listing-bolts j', rings o, and draw-bar F, the whole constructed, ar-

mnged, and operated Substantially :is dcscribed.

2. The combination7 with tho, liziiimr-ioo'li B, having;` :in oval noch, without :L shoulder, and gradually tapering from its buse upward and terminating' in a threaded bolt7 7i, of :i longitudinal barrow-bnr, A, having; n correspsmli n gly-l'ormed socket made lon gitndinally the-ein, cross-gir@ C, and nui'J l), substantially as L. scribed, and 'for the purpose set forth.

JAMES li. XVALKER. fitnessesz THEO. S. DAY, N. DYER. 

